We consider some estimate of the size of the halo that is roughly constant in time. This is not a value like \(r_{200}\) , which changes as galactic halos form (see Chapter 9 of [1]}). Therefore, we choose a value \(R\)  that is not very much larger than the maximum size of the halo at all stages of the evolution of the galaxy, at which it can be called a galaxy. Taking into account the ambiguous definition of this quantity, we will use various possible values of the halo radius \(R\)  in numerical estimates, from underestimated to overestimated.
